Agawam Chess Club

The Blatantly Obvious

Desperado
A threaten or trapped piece sacrificed for the most it can get or to inflict damage.
Direct Attack
Moving a unit into position to capture another with advantage.
Interference
Cutiing the power of an enemy unit by putting a unit in the way, often with a time-gaining counterattack.
Mating Attack
A general onslaught against the King, resulting in mate or material gain.
Saving
Avoiding the loss of material, usually with a time-gainging threat.

Fork
An attack by one unit against two different enemy units at the same time. A "Royal" or "Family" Fork is a fork against a Rook, a Queen, and the King.
Pin
An attack on an enemy unit that shields a move valuable piece. A unit pinned to the King cannot move.
Skewer
An attack on an important unit that by moving exposes another unit to capture.
Unpin
A counterattack that breaks a pin, gains time to break a pin, or ends a pin by eliminating or diverting a pinning unit.